gmattesttaker2 wrote:
At a party there are 60 men and 40 women. If 70 percent of the men and 80 percent of the women wear red t-shirts what percentage of all the people wear red t-shirts?
Here, it seems easier simply to calculate the number of people who wear red t-shirts.
Since 70% of the 60 men wear red t-shirts, men who wear red t-shirts = .7(60) = 42.
Since 80% of the 40 women wear red t-shirts, women who wear red t-shirts = .8(40) = 32.
Of the 100 people, the percentage in red t-shirts = (total people in red-shirts)/(total people) = (42+32)/100 = 74%.
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